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1、StudyonmicrostructureandpropertiesofsolidsolutionCu-Cr-Zr-Mg-CealloyHOUBini,CHENKaixuani,CHENXiaohua2,CHENMingwens,LIUSongi,KANG5La,WANGZidongi(/.UniversityofScienceandTechnologyBeijing,SchoolofMaterialsScienceandEngineering,Beijing100083;2.UniversityofScienceand
2、TechnologyBeijing.StateKeyLaboratoryforAdvancedMetalsandMaterials,Beijing100083;1()3.UniversityofScienceandTechnologyBwijing,SchoolofMathematicsandPhysics,Beijing100083)Abstract:TheinfluenceofdifferentsolidsolutiontreatmentonthemicrostructureofCu-0.4wt.%Cr-0.2wt.
3、%Zr-0.15wt.%Mg-0.02wt.%Cealloyhavebeeninvestigatedbydispersespectroscopy(SEM-EDS),transmissionelectronmicroscope(TEM)andX-raydiffraction(XRD).The15SEMresultsshowthatnewphaseformedinthematrixwiththeshapeoflamellaeunderthedefinitetemperatureandtime.Throughanalyseso
4、ftheenergyspectrum(EDS),thenewphasewasanoxide・ByindexingthediffractionpatternsandXRDanalysis,theoxidewasMg2Zr5OI2・Electricalconductivityandmicro-hardnessofthisalloywereinvestigatedaftersolidsolutiontreatment.Keywords:MaterialsProcessing;Cu-Cr-Zr-Mg;solidsolution;
5、microstructure;precipitatedphase200IntroductionCu-Cr-Zralloyisaclassicprecipitationhardenedalloyforthepropertiesofgoodthermal,excellentelectricalconductivityandhighstrength.Inordertoobtainhigherconductivityandtensilestrengththeaccuratelycontrolledsolidsolution,co
6、ldrollingandagingtreatmentarenecessaryprocessforprecipitatehardness・Attheagingstate,themicrostructure,precipitatephase,25conductivityandothervariouspropertiesofthesealloyshavewidelybeenstudied
7、i-3
8、.Duringtheagingtreatmentthesupersaturatedsolidsolutiondecomposesin
9、tochromium,CuxZry(Cu3Zr,Cu4ZrCu5ZrCu51Zr14)[4-8]particleandchromium-rich,zirconium-richphase,HesulerphaseCrCu2(ZnMg)wasalsofoundinCu-0.6wt.%Cr-0.15wt.%Zr-0.05wt.%MgalloybyTangetal[4j.PLiu[9],JHSu[3.io]andSGMu[ii].However,thereislessattentiontotheinfluenceofprecip
10、itated3()phaseinsolidsolutiontreatment.DuringthesolidsolutiontreatmentCr,ZrsolubilizesinCumatrixandthesupersaturatedsolidsolutionisformed,andtherestMg,ZrandOwi
